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Thread: c7 lt1 boosted p16f3 code fun

  1. #1

    c7 lt1 boosted p16f3 code fun

    Got a C7 lt1 with lt4 fuel system and blower, port injection, cam, and heads. Car has been tuned on Lt4 stuff on e50 for the last 1.5 years no issues. This round we did ported blower and snout, port injection, heads, cam and e85. Everything was going ok on the dyno. Then unstrapped it to do some road tests, and come back in and go to restart the car and goes Rep mode with p16f3 code. I couldnt read it with Hptuners, so I read it with the Autel. But it would reoccur after clearing codes, key on engine off. So I used Hptuners to write the ecm and tcm to clear the code. Then after the second roadtest, came back to the shop, shut the car off, went to restart it, p16f3 again, and this time it will not clear after writing the ecm/tcm. Car is immobile, as soon as the starter turns over the check engine light emits and Rep mode. Has anyone experienced this and have any reason for p16f3 and remedy?
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    Last edited by Flipper7; 16 Hours Ago at 06:24 PM.

  2. #2
    Potential Tuner
    Join Date
    Jan 2008
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    8
    I have had one do the same thing when I had my base airflow table had larger numbers than I would normally use (not even close to the 64 max number the table is limited to). Took me a while to figure it out. Post the file.

  3. #3
    Quote Originally Posted by GSXRWS6 View Post
    I have had one do the same thing when I had my base airflow table had larger numbers than I would normally use (not even close to the 64 max number the table is limited to). Took me a while to figure it out. Post the file.
    I've cars with higher base airflow than this particular one, but again if was on e50 mix.

  4. #4
    Senior Tuner
    Join Date
    May 2003
    Location
    South FL
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    1,584
    Possible corrupt Data flashed to the ECU. If you're sure you haven't exceeded the value boundaries of some table, as mentioned above. Do a write entire and ensure you have a good USB cable.
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